Control of sulfates in membrane cell chlor-alkali process

Details Control of sulfates in membrane cell chlor-alkali process Control of sulfates in membrane cell chlor-alkali process

1985-05-31

1986-05-06

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

204128, C25B 116

Patent

active

045869936

ABSTRACT:
Method of addition of calcium ions to salt-depleted brine prior to resaturation, wherein the concentration of sulfate impurity is controlled. The invention relates to a process for the electrolysis of aqueous alkali metal chloride solutions to produce chlorine and high purity alkali metal hydroxide solutions.

REFERENCES:
patent: 2753242 (1956-07-01), Davis
patent: 2902418 (1959-09-01), Burns
patent: 3970528 (1976-07-01), Zirngiebl et al.
patent: 3998709 (1976-12-01), Winkler
patent: 4078978 (1978-03-01), Zirngiebl
patent: 4176022 (1979-11-01), Darlington
patent: 4277447 (1981-07-01), Chambers et al.
patent: 4488949 (1984-12-01), Lee et al.

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